musicscore.score

class musicscore.score.Score(version='4.0', title=None, subtitle=None, get_quantized=False, simplified_sextuplets=None, new_system=False, *args, **kwargs)[source]

Bases: MusicTree, QuantizeMixin, SimplifiedSextuplets, FinalizeMixin, XMLWrapper

Parent type: None

Child type: Part

XMLClass: alias of XMLScorePartwise

add_child(child: Part) → Part[source]

Check and add child to list of children. Child’s parent is set to self.
Part’s xml_object is add to score’s xml_object as child
Part’s score_part.xml_object is added to score’s xml_part_list

Parameters:: child – Part, required
Returns:: child
Return type:: Part

add_part(id: str) → Part[source]

Creates and adds part

Parameters:: id – part’s id
Returns:: part

classmethod create_tree_from_list(tree_list_representation: list[list[Any]], represented_attribute_names: list[str]) → T

export_xml(path: pathlib.Path) → None[source]

Creates a musicxml file

Parameters:: path – Output xml file
Returns:: None

filter_nodes(key: Callable[[T], Any], return_value: Any) → list[T]

Tree method

>>> root.filter_nodes(lambda node: node.get_level(), 2)
[grandchild1, grandchild2, grandchild3]

finalize() → None[source]

FinalizeMixin method

finalize can only be called once.

It calls finalize method of all children.

get_beat(*args, **kwargs) → Beat

MusicTree method

This method can be used for Score and Part, Measure and Staff and Voice

Parameters:

args – can be used instead of kwargs. A mixture of args and kwargs is not allowed.
kwargs – part_number, measure_number, staff_number, voice_number, beat_number depending on musicscore’s class. A Staff for example needs voice_number and beat_number while a Score needs all keyword arguments.

Return type:

Beat

get_beats() → List[Beat]

MusicTree method

This method can be used for Score and Part, Measure, Staff and Voice.

Returns:: a flat list of all beats.
Return type:: List[Beat]

get_children() → list[T]

Tree method

Returns:: list of added children.

get_children_of_type(type_: type) → list[T]

Tree method

Returns:: list of added children of type.d
Return type:: list[Tree]

get_chord(*args, **kwargs) → Chord

MusicTree method

This method can be used for Score and Part, Measure, Staff, Voice and Beat

Parameters:

args – can be used instead of kwargs. A mixture of args and kwargs is not allowed.
kwargs – part_number, measure_number, staff_number, voice_number, beat_number, chord_number depending on musicscore’s class. A Staff for example needs voice_number, beat_number and chord_number while a Score needs all keyword arguments.

Return type:

Chord

get_chords() → List[Chord]

MusicTree method

This method can be used for Score and Part, Measure and Staff, Voice and Beat

Returns:: a flat list of all chords.
Return type:: List[Chord]

get_distance(reference: T | None = None) → int

>>> root.get_distance()
0
>>> greatgrandchild1.get_distance()
3
>>> greatgrandchild1.get_distance(child2)
2

get_farthest_leaf() → T

>>> root.get_farthest_leaf()
greatgrandchild1

get_layer(level: int, key: Callable[[T], Any] | None = None) → Any

Tree method

Parameters:

level – layer number where 0 is the root.
key – An optional callable for each node in the layer.

Returns:

All nodes on this level. The leaves of branches which are shorter than the given level will be repeated on this and all following layers.

Return type:

list

get_leaves(key: Callable[[T], Any] | None = None) → list[Union[Any, list[Any]]]

Tree method

Parameters:: key – An optional callable to be called on each leaf.
Returns:: nested list of leaves or values of key(leaf) for each leaf

>>> root.get_leaves()
[child1, [[greatgrandchild1, greatgrandchild2], grandchild2], child3, [grandchild3]]

get_level() → int

Tree

Returns:: 0 for root, 1, 2 etc. for each layer of children
Return type:: nonnegative int

>>> root.get_level()
0
>>> child1.get_level()
1
>>> grandchild1.get_level()
2
>>> greatgrandchild1.get_level()
3

get_list_representation(key: Callable[[Tree[T]], Any]) → list[list[Any]]

get_measure(*args, **kwargs) → Measure

MusicTree method

This method can be used for Score and Part

Parameters:

args – can be used instead of kwargs. A mixture of args and kwargs is not allowed.
kwargs – part_number, measure_number depending on musicscore’s class.

Return type:

Measure

get_number_of_layers() → int

>>> root.get_number_of_layers()
3

get_parent() → T | None

Tree method

Returns:: parent. None for root.
Return type:: Tree

get_part(*args, **kwargs) → Part

MusicTree method

This method can be used for Score

Parameters:

args – can be used instead of kwargs. A mixture of args and kwargs is not allowed.
kwargs – part_number.

Return type:

Part

get_position_in_tree() → str

Tree method

Returns:: 0 for root. 1, 2, … for layer 1. Other layers: x.y.z…. Example: 3.2.2 => third child of secod child of second child of the root.
Return type:: str

>>> print(root.get_tree_representation(key=lambda node: node.get_position_in_tree()))
└── 0
    ├── 1
    ├── 2
    │   ├── 2.1
    │   │   ├── 2.1.1
    │   │   └── 2.1.2
    │   └── 2.2
    ├── 3
    └── 4
        └── 4.1

get_possible_subdivisions(beat_quarter_duration: QuarterDuration | None = None) → List[int]

QuantizeMixin method

This method is used by Beat’s quantize_quarter_durations().

Possible subdivisions dictionary can be set with set_possible_subdivisions(). Keys in the subdivisions dictionary correspond to beat quarter durations (e.g. 1, 1/2 etc.) For example if get_possible_subdivisions()[1] == [3, 5, 8] a beat with a quarter duration of 1 can after quantization consists only of eighth triplets, quintuplets and 32ths. If this dictionary is not set or beat_quarter_duration as key does not exist, the parent’s possible subdivisions dictionary will be checked.

Score has a default POSSIBLE_SUBDIVISIONS dictionary which will be used if no other musicscore node on the path from self to root has its own possible subdivisions dictionary with beat_quarter_duration as a key. For setting possible subdivisions dictionary use always set_possible_subdivisions().

Parameters:: beat_quarter_duration – Used as key in possible subdivisions dictionary. If None and self is a Beat self.quarter_duration is used. If None and self is not a Beat it is set to 1.
Returns:: A list of possible subdivisions of a Beat. This is used by beat’s quantize_quarter_durations()
Return type:: List[int]

get_reversed_path_to_root() → list[T]

Tree method

Returns:: path from self upwards through all ancestors up to the root.

>>> greatgrandchild1.get_reversed_path_to_root()
[greatgrandchild1, grandchild1, child2, root]

get_root() → T

Tree method

Returns:: root (upmost node of a tree which has no parent)
Return type:: Tree

>>> greatgrandchild1.get_root() == root
True
>>> child4.get_root() == root
True
>>> root.get_root() == root
True

get_self_with_key(key: Callable[[T], Any] | None = None) → Any

get_staff(*args, **kwargs) → Staff

MusicTree method

This method can be used for Score, Part and Measure

Parameters:

args – can be used instead of kwargs. A mixture of args and kwargs is not allowed.
kwargs – part_number, measure_number, staff_number depending on musicscore’s class.

Return type:

Staff

get_tree_representation(key: Callable[[T], Any] | None = None, space: int = 3) → str

Tree method

Parameters:: key – An optional callable if None string(node) is called.
Returns:: a representation of all nodes as string in tree form.

>>> print(root.get_tree_representation())
└── root
    ├── child1
    ├── child2
    │   ├── grandchild1
    │   │   ├── greatgrandchild1
    │   │   └── greatgrandchild2
    │   └── grandchild2
    ├── child3
    └── child4
        └── grandchild3

get_voice(*args, **kwargs) → Voice

MusicTree method

This method can be used for Score and Part, Measure and Staff

Parameters:

args – can be used instead of kwargs. A mixture of args and kwargs is not allowed.
kwargs – part_number, measure_number, staff_number, voice_number depending on musicscore’s class.

Return type:

Voice

group_parts(number: int | str, start_part_number: int, end_part_number: int, symbol: str = 'square', name: str | None = None, abbreviation: str | None = None, **kwargs) → None[source]

Adds a XMLPartList child

Parameters:

number – sets number property of XMLPartGroup
start_part_number – number of part to start the group
end_part_number – number of part to end the group
symbol – symbol property of XMLGroupSymbol:’none’, ‘brace’, ‘line’, ‘bracket’, ‘square’; default: ‘square’
name – value of XMLGroupName
abbreviation – value of XMLGroupAbbreviation
kwargs – kwargs of XMLGroupSymbol

Returns:

None

iterate_leaves() → Iterator[T]

Tree method

Returns:: A generator iterating over all leaves.

remove(child: T) → None

Tree method

Child’s parent will be set to None and child will be removed from list of children.

Parameters:: child –
Returns:: None

remove_children() → None

Tree method

Calls remove() on all children.

Returns:: None

replace_child(old: T, new: T, index: int = 0) → None

Tree method

Parameters:

old – child or function
new – child
index – index of old child in the list of its appearances

Returns:

None

set_multi_measure_rest(first_measure_number: int, last_measure_number: int) → None[source]

Creates a multi measure rest

Parameters:

first_measure_number – number of measure to start the multi measure rest
last_measure_number – number of measure to end the multi measure rest

Returns:

None

set_possible_subdivisions(subdivisions: list[int], beat_quarter_duration: QuarterDuration | None = None) → None

QuantizeMixin method

This method is used to set or change possible subdivisions dictionary of a beat or its ascendants. For example if get_possible_subdivisions()[1] == [3, 5, 8] a beat with a quarter duration of 1 can after quantization consists only of eighth triplets, quintuplets and 32ths.

Parameters:

subdivisions – list of possible subdivisions to be used in musicscore.beat.Beat.quantize_quarter_durations()
beat_quarter_duration – If None and self is a Beat self.quarter_duration is used. If None and self is not a Beat it is set to 1.

Returns:

None

to_string(*args, **kwargs)

FinalizeMixin method

It triggers finalize() first before calling parent’s xml_object.to_string() method. If no xml_object exists (it means there is no direct MusicXML equavalent of this class) a ClassHasNoMusicXMLEquivalentError is thrown.

traverse() → Iterator[T]

Tree method

Traverse all tree nodes.

Returns:: generator

write(*args, **kwargs)[source]: Not implemented. Use Score.export_xml instead!

property content: Any

default_show_accidental_signs = 'modern'

property get_quantized: bool

QuantizeMixin property

If get_quantized is set to None the first get_quantized of ancestors which is False or True will be returned.
If musicscore.score.Score.get_quantized is set to None it will be converted to False
musicscore.measure.Measure.finalize() loops over all beats. If musicscore.beat.Beat.get_quantized returns True musicscore.beat.Beat.quantize_quarter_durations() is called.

Type:: Optional[bool]
Return type:: bool

property is_first_child: bool

property is_last_child: bool

>>> t = TestTree('root')
>>> for node in t.traverse():
...    if node.name in ['root', 'child4', 'grandchild2', 'grandchild3', 'greatgrandchild1']:
...        assert node.is_last_child
...    else:
...        assert not node.is_last_child

property is_leaf: bool

Tree property

Returns:: True if self has no children. False if self has one or more children.
Return type:: bool

property is_root: bool

Tree property

Returns:: True if self has no parent, else False.
Return type:: bool

property new_system: bool: Set or get new_system property. It will be automatically set to True if a Measure sets its musicscore.measure.Measure.new_system to True. <encoding> in XMLScorePartwise’s <identification> will have a <support> child with attribute new-system if musicscore.score.Score.new_system is set to True.

property next: T | None

Tree property

Returns:: next sibling. None if this is the last current child of the parent.
Return type:: Tree

property page_layout: PageLayout

Set and get page layout. After setting value, page layout’s parent is set to self.

Type:: PageLayout
Returns:: PageLayout

property previous: T | None

Tree property

Returns:: previous sibling. None if this is the first child of the parent.
Return type:: Tree

property scaling: Scaling

Type:: Scaling
Returns:: Scaling

property show_accidental_signs: str

MusicTree property

If show_accidental_signs is set to None the first get_quantized of ancestors which is False or True will be returned.
If show_accidental_signs is set to None it will be converted to default_show_accidental_signs
Possible show_accidental_signs are: None, ‘modern’, ‘traditional’

Type:: Optional[str]
Return type:: str

property simplified_sextuplets: bool

property staff_layout

Set and get staff layout. After setting value, staff layout’s parent is set to self.

Type:: StaffLayout
Returns:: StaffLayout

property subtitle

If val is None and a subtitle object as credit already exists, this object will be removed.
If val is not None: - if a subtitle exists its value_ will be replaced. - else a subtitle as credit will be added.

Type:: Optional[str]
Returns:: Optional[str]

property system_layout

Set and get system layout. After setting value, system layout’s parent is set to self.

Type:: SystemLayout
Returns:: SystemLayout

property title

If val is None and a title object as credit already exists, this object will be removed.
If val is not None: - if a title exists its value_ will be replaced. - else a title as credit will be added.

Type:: Optional[str]
Returns:: Optional[str]

property up: T | None

Tree property

Returns:: get_parent()
Return type:: Tree

property version: str

Type:: Any
Returns:: xml_object’s version
Return type:: str

property xml_object: XMLElement

XMLWrapper method

This musicscore class has an equivalent MusicXML class which can be reached via this property.

If an attribute is not found directly in the main class, it wll be passed on to __get_attribute__ or __set__attribute__ methods of self.xml_object. It can also use the short cut attributes of XMLElement to get or set the first child.

Returns:: wrapped MusicXML element of type XMLClass

musicscore.score.POSSIBLE_SUBDIVISIONS = {1/4: [2, 3], 1/2: [2, 3, 4, 5], 1/1: [2, 3, 4, 5, 6, 7, 8]}

musicscore.score.SUBTITLE = {'default_x': {'A4': {'portrait': 616}}, 'default_y': {'A4': {'portrait': 1508}}, 'font_size': 18, 'halign': 'center', 'valign': 'top'}

musicscore.score.TITLE = {'default_x': {'A4': {'portrait': 616}}, 'default_y': {'A4': {'portrait': 1573}}, 'font_size': 24, 'justify': 'center', 'valign': 'top'}